Telephone receiver or transmitter



mm. '18, m4. imam:

, L. SCHMIDT TELEPHONE RECEIVER 0R TRANSMITTER Filed June 26 1922 the diaphragm nnnziann'r seminar. on sitcoms-n; new some so 1241.510?

' 10131", 013 BROOKLYN, IiFE'W TELEEEQTEE IELESEIVEE 0R TRANSEEIFPFEKZ.

.lkgiplicaticn flee June To all 1417mm ii may concern:

Be it. known that it, LAMBERT of Brooklyn, county of Kings, New-York, have invented. a certain new useful Improvement in :1 description.

Ehis invention relates to telephone ceivers or transmitters of the ningrneio and more particularly concerns producing; cliiiphrngm of the magnet. armature.

In Patent No. 1,452,850, April 24-, 1923, I have cnt invention is particularly designed employed.

More particularly, the present, invention broaclly coniprchenrls {U1 improved protect.-

ed vniversnl pivotal connecsion between stantizilly perpendicular to the piano or iiinphrngz'n'i. tnus insuring emission of the voice tones and greatly creasing the scnsitivcness oi the instrument to minute fluctuations in polarity of the tel-ranting currents,

In one embodiment of the invention which 1y satisfactory in practical use. the armature which is i'ulcrmned inter- I have found high mediate of its ends is provided at one encl which the end oi:

with an opening: Through rod is loosely engaged. one end of ssitl nel is formeri. in the head on the end of said rocl ing movement. in order to prevent ing, in one direction and the of grit or dirt in the groovc or or channel therein and tnc diaphragm rod. Thus movement of the end of? the armature tween the opposed poles of the magnet. r06 connected to hentletl emi of ScnMmr, a cihizen of the United States, and a resident ani Stace oi? and ifeleg hone Receivers or T zinsinittei's, of which the following is the vibration transmitting connection between the sound the instrument, anal granted to me on described and claimed a telephone transmitter or receiver having: certain improved "features (Ti con struction ineonnection with which the pres to he the arm-(it so that sold rod will at. all times remain suba loud (list-inch opening groove or chanarinntnre in 'Whicl'i a has tree rock- Shifting movement of the .rocl hhrough sniri openecuinuhition channel in the slight arc-mite the diaphragm will always remain in its normal perpendicular position iaphr with respect to the plane of the so that the rod will not exert sional strain upon the diaphragm W would interfere "with the amplitude of vibratory movement.

l Viih the above and other ol cts in vi the invention consists in the improved phrngin operating connection for i ments of the character refer tne form. construction and inent oi: fiche several zi fter more fully timer accompanying ctrmvi incorporated in the sndoi ncll cl In the tlrawing wherein l hove in one preferred zine satisfactory e of the invention one. in which simila ence characters designate corres parts thrmighoul; ghe sci l w Figure l. is a s ephone receiver or trap. casing: for the magnet scrn giece being; oini'ttcri;

Figure 3 is enlnr en on the line 2-2 of Figure 3 is i 3-4; oi? Fig-Z.

Figure is =1 {ietui in the :iccompnn; poses of illustration, tionnl form of permanent '1 secured to the rear sirlc the the latter heing of a suitable non-mag: material. To opposite cinls oi; he nent'mngnet 5 the pole pieces 7 sni fixed. said pole pieces leing provicleri singularly (iisposecl shoes 2% iii; 1. o ends, the corrcspontiing shoes pieces being posed in the in opposed, relsi'ion to each other. the spacecl polo shoes the elec rist coil 9 is sirrzinpgerl, saifl. coil hei' a cylindrical spool of non-ins rial. Through the here of this the t he

liniirical armature 10 is dis a opposite ends normally positional hetweenlheopposefi pole shoes snci olv contact with the anal faces thereof. The

linclrical armature is iulc-ruincrl at s. pthe approximately nnway between its in the bore of the coil spool. As the specific fulcrum or mounting for the armature constitutes no essential feature of the resent invention, but is "fully illustratei, olescrih l anal claimcl in my issued- :sysaent, snciii.

hethe iii mounting will not be herein further referred to. A

The front plate 6 is formed with the usual annular marginal rib 11 to which'the outer edge of the flexible diaphragm 12, preferablv of mica, is suitably secured.

he inner end of the cylindrical armature 10 has a diametrically reduced extension 13. This extension is provided at one side in itsperiphery with a transverse groove or channel 14 With which the opening 15 ex tending through said armature extension communicates at one of its ends. The diaphragm vibrating rod 16 is threaded at one end and extended through. a central opening in the diaphragm 12 to receive the nut 17, said nut after proper adjustment, being fixed in position by coating the same with shellac or by other suitable means. The rod 16 at its other end is engaged through the opening 15 in the reduced end of the armature and it will be noted that this opening is of slightly greater diameter than said rod. This end of the rod terminates in a head 18 which is of greater diameter than the opening 15 and is loosely positioned in the groove orv channel 14 so that said head may have a free rocking motion in said channel in the slight arcuate movement of the armature end between the pole shoes during which movement the axis of the opening 15 will be positioned out of coinciding relation with the axis of. the rod 16. Thus it will be obvious that in the'vibratory movement or the armature the only movement transmitted to the rod 16 is directly in the line of its axis, there being no lateral deflection of this rod which would result in torsional strain on the diaphragm 12.

The relative movement of the armature end and the rod 16 axially of said rod is prevented by means of a split resilient metal sleeve 19 which is removably engaged over the reduced end 13 of the armature and entirely covers and conceals the slot or channel 13. The head 18 of the rod 16 is preferably formed with a convex end face for rocking contact with the inner face of the sleeve 19. The sleeve also serves to prevent the entrance-of particles of grit or dirt to the groove 14 which might possibly interfere with the free universal pivotal action of the rod endin the opening 15 of the armature. In the arcuate .movement of the armature in one direction as it is attracted by the pole shoe 8 at one side thereof, the rod 16 is axially moved in one direction by the pressure of the sleeve 19 against the head 18, while when the armature end moves in the opposite direction from its normal position under the attraction of the other armature shoe 8, the rod 16 is pulled inwardly by the coaction of the end 13 of the armature with the head 18 on said rod. In the movement of the armature in either direction, it

is apparent that the end of the rod 16 may have a free universal swivelling or pivoting movement with respect to the armature so that it will at all times maintain a perpenicular position relative to the plane of the dia' hra'gm 12.

rom the foregoing description, the construction and operation of the device will be readily understood. In a very simple construction, 1 have provided a protected universally movable connection between the armature and the diaphragm which will be instantly responsive to the slightest pulsations or variations in polaritv of the alternating voice currents when the instrument is used as a receiver to transmit vibrations of-maximum amplitude to the diaphragm 12. It is obvious that the same highly sensitive action will take place when the instrument is used as a transmitter and the sound waves are impressed upon the vibratory diaphragm. It will further be apparent that while I have herein referred to an adaptation of the present improvement for use in connection with magneto telephones, the device might also possess other capabilities and be advantageously applied for use in connection with the armature of a magnetic structure intended for more or less general application in the art. In such other applications of the invention it may be found desirable to resort to certain minor structural modifications.

Accordingly, it is to' be understood that while I have herein shown and described one practical and satisfactory embodiment of the device, the same may nevertheless be incorporated in numerous other alternative structures and I, therefore, reserve the privilege of resorting to all such legitimate changes in the form, construction and relative arrangement of the several parts as may be fairly embodied within the spirit and scope of the invention as claimed.

I claim:

1. In combination with the vibratory armature of a magnetic structure and a part actuated thereby, means for transmitting the vibrations of the armature to said part.- comprising a rigid element having a fixed connection at one of its ends to said part,

said armature being provided with a seat.

said element having a part at its other and loosely engaged on said seat. and means carried by the armature extending over said seat to retain said part in rocking contact therewith.

'2. In combination with a vibratory armature of a magnetic structure and a part to be actuated thereby, a rigid element having a fixed connection at one of its ends to said part, said armature being provided with a seat, said element having a part at its other end loosely engaged on said seat, and a member having detachable frictional iii extermiengagmnnnt with thnninm'ture and ci part in ing over said sea? to reinin sni rocking Contact therewith,

23. In. combination with the ihrniory 1xrmature of a insgneiic strnciiuro and :1 pamto he actuated thereby, a. rigid. nioinnni hav ing a fixed connection at one of its ends #0 said part said element at its other and ex- (onding through an opening in the airmaturn and terminating in a head, said :21 1H1 turn and :ho connected and of said eiement having roiativn unive'szii pivotal movement in tho vibratory movement of t 26 ai'inatnrm and means (ietnchnbiy engaged with the mmaiure to retain said armature and the connecting; element in assembiegi Jo-operative ieini'i In.

in vomhinaiion strm-ii v of a magneio having :1 'ihratoi'y zunmturn and a diaphragm to he ac'iuninri inereny, a. rigid Pieinon'r having a i'ixm'l conecrion at one of iiis anus to soil diaphragm, 21hr oihor end oi" said eiei'nent' and the nrmniure being provided with -ozuri'ing means r-iii'i'irding a universality movuhie connection fherebetween, and protontiro means iif-i'zmtshiy ongngmi with the 2H- nml'ui'o and aciing to pro rsiziiivn mow ment. of the miniature element in HM axial direction of ihe intter during ifho i'ihintory movements or "*"hn armature.

.1. i combinion with, i STIHCUITQ of n magneto teig'iiono having- 2: vihl'ntory armature; and dia 'iiii'npi. to on win/aim} ihvrehy. szziri n'infure forum? with :1 oyiimirioni exinnsioz'i \i'. on: ral. m ("iRlfi'iL having; 2i fine-t l won Hon 1 one oi its sink to said diaphragm lhv oviimh" "(2i nrmaiure e7 having on opvning; Ii'n' un'n r-rhinh aha ot snri or snic'i' nix-man is loosely engagnri, said armsture extension-being further provided with a groove in one side inizersecting said opening ililii said eiomeni terminating in a head having free rocking movement in said groove. \viiornhy said element will at all times remain in a perpendicular position relative to tn-i plane of the diaphragm, and means for preventing resistive movement of like :urmuture and said connecting einniem axially of the 1am: in the vibratory morn monts of the armature.

(3. In combination with the nnignetic structure of n. magneto telephone having :1 vibratory armatnrn and a diaphragm to he actuated thereby said armature being formed with :1 cylindrical extension :it ono onii, :1 rigid element having a fixed Conner-- iLion nil one m 'iis ends to said (iin'phragin. the ryiindrii'ai armature extension having an opening through which "(he Oi'i'lBl' and of sniri Rieman is .ioose1;g: engaged., said armsture extension. being further provided with a groove in one side intersecting said opening and said element terminating in a head having a free rocking movement in said groove whereby said element will at xii iIHOS remain in a perpendicular position. relative io the plane o1 the diaphragm, and :1 demcimbie rosihent sieave aciapted to ho managed upon him cyiimiricai arm-Mum and over iiiC {II'HUVG iin in to prevent i'niative movnnisni of the :ir mturr and said. element: iii the axial diinction of rho hitter iiUTiTifj he vimnfor v movemo is of His armature" in insf (my t i Piaim iiio forog' ingi as in 'invm'iiion. have signed my nszmo heronrnfior.

i in ii'iiii/ERT SCHMUD 

